Muffler cut-out.



G. LUNDBERG.

MUFFLER GUT-OUT.

APPLICATION FILED 001'. a, 1910.

1,006, 1 O8, Patented 0013. 17, 1911 w A? 9 7 ?IIIIIIIIIIIII III v LQL'Z' 7765565: 772011977151 amwezwwe COLUMBIA PLANOGRAIH O0" WASHINGTON.D. C.

em stars rat GUSTAVE LUNDBERG, OF CHICAGO, ILLINOIS.

MUFFLER CUT-OUT.

To all whom it may concern:

Be it known that I, GUsTAvn LUNDBERG, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Muffler Gut-Outs, of which thefollowing is a specification.

This invention relates to means for relieving the pressure in theexhaust pipes or mufiler pipes of internal combustion engines, and moreespecially to an .improved pressure relief valve, adapted for use inconnection with the exhaust pipe of such an engine. at a point in theexhaust pipe between the engine and the muflier, and the valve which ishere illustrated as embodying the present invention is shown as soarranged. It comprises, briefly, a two part casing or sleeve adapted tobe clamped upon the ex haust pipe to cover an opening through the wallof such pipe, such sleeve having an outlet port in registry with theopening in such pipe, and a valve member, or valve disk, adapted to fitover and close such outlet ort. better understood by reference to theaccompanying drawings, in which:

1 Figure 1 is a View in side elevation showing a portion of the exhaustpipe of an engine, a muffier, and my improved cut-out valve in placeupon the former. Fig. 2 is a longitudinal vertical section through saidexhaust pipe and valve. Fig. 3 is a trans verse vertical section on theangular line 33 of Fig. 2, looking in the direction indicated by thearrows.

As shown in said drawings, 4 indicates a portion of the exhaust pipeleading to the muffler 5, and 6 designates as a whole the complete valvein place upon such exhaust pipe. Said valve comprises a casing or sleeve7, shown here as formed in'two parts, an upper and a lower part, 8 and 9respectively, which may be placed upon and around the exhaust pipe andthen brought together and held in place by means of bolts, and nuts '10,10, passing through and engaging with horizontal flanges 11, 11, on themeeting edges of such parts 8 and 9. Said casing 7 is shaped at its endportions to fit closely around the wall of the exhaust pipe, the

Specification of Letters Patent.

Application filed October 3, 1910.

Such a valve is ordinarily used These parts, and others, may be.

Patented Oct. 17, 1911.

Serial No. 585,110.

openings through the end walls of said casing being circular, but thecenter portion of said casing is enlarged, leaving an annular spacebetween the outer wall of the exhaust pipe and the inner wall of thecasing, as shown at 15 in Figs. 2 and 3. The purpose of thisconstruction is to permit of the easing being placed when necessary uponcurved portions of an exhaust pipe, the openings through the end wallsof said casing in such case being enlarged, by filing, or otherwise,into the form of ellipses in order to fit closely around the wall ofsaid exhaust pipe. The part 8 of the valve casing 7 is extended a shortdistance diagonally upward and provided with a circular opening throughsuch extended portion, forming an outlet port 17, which registers withan opening 19 cut through the wall of the exhaust pipe. The object in soextending the part 8- diagonally with respect to the axis of the exhaustpipe is to permit of the gases escaping from the pipe 4- through theport 17 by being first turned through less than a right angle, and alsoto cause them to be directed rearwardly, instead of straight down, whenthe valve is arranged with the opening 17 downward and placed upon theexhaust pipe of an ordinary automobile engine leading to a mufller atthe rear of the car.

The annular edge of the outlet port 17 is ground fiat to form anexterior valve seat 25 which is covered by a flat disk, or valve member26, mounted upon the end of a curved swinging valve arm 27. Said disk 26is formed with a raised boss, 30, at its center, the upper surface ofwhich boss is spherically recessed to engage with the spherical lowersurface 31 of an enlargement, or head 32, upon the end of said valveZLI'III.

34 designates a cap screw which passes engages with the lower interiorwall of W said opening and with the head of said cap screw, and thelower part of said opening 35 is also slightly larger than the diameterof said cap screw. By this means the Valve disk 26 is held in engagementwith the end of the valve arm, but in a manner permitting of itsoscillation upon the end of such arm in order that it may always seatfiat upon its seat irrespective of slight inaccuracies in the shape ormovement of the valve arm or other parts, due to wear or otherwise. Thepurpose of the spring 36 is to always keep the upper surface of the bossand the lower surface of the head 32 in engagement with each other, andthus prevent rattle between the parts. By reason of this constructionalso, the valve disk is rotatable upon the end of its valve arm, and maybe easily ground upon its seat by rotating it with the fingers withoutdisassembling any of the parts. For convenience in so doing, as well asto strengthen said valve disk, the latter is provided with radialtriangular ribs, 40, 40.

The means for swinging the valve arm 27 comprises a walking beam lever45 made integral at its center or hub portion 46 with the end of saidvalve arm opposite to the enlarged end 32. Through said hub portionpasses a pivot rod 47, mounted at its ends in vertical posts orstandards 48, 48 rising from the part 8 of the valve casing 7. At theend of said lever 45 which is toward the valve disk is provided a hookor opening 50 engaging with a coiled spring 51, secured at its oppositeend to a lug 52 upon the valve casing. By the tension of this spring thevalve arm 27 is drawn down and the valve disk 26 normally kept upon itsseat, while it is evident that a movement of the opposite end 53, of thelever 45 in the direction indicated by the arrows will raise the valvedisk from its seat and allow the escape of gases through the outletport. Such a movement of the lever 45 is conveniently effected by anupward pull upon the end 53 when the device is arranged with the outletport downward, which would be the ordinary arrangement upon the exhaustpipe of an automobile engine. It is evident also that an excess ofpressure in the pipe 4, due to a muffler explosion, or otherwise, willtend to raise the valve disk from its seat and allow the gases toescape, whereby the muffler and other parts may be saved from injury.

The parts here shown including the lever 45, the pivot rod 47 and thestandards 48, operating the valve arm 27 may be otherwise arrangedwithout departing from the spirit of the present invention, but thearrangement here shown is deemed a preferable one in that it allows thefreest escape of gases through the outlet port, directing them away fromthe operating parts of the device, and allowing them to escape towardthe rear of the car when the device is used upon the exhaust pipe of anautomobile engine as suggested above.

I claim as my invention:

1. A muflier cut-out comprising a divided sleeve adapted to be placedupon an exhaust pipe and provided with a diagonally arranged outletopening having an exterior valve seat, a movable valve disk adapted toseat upon said valve seat, means for yieldingly maintaining said valvedisk in one of its positions, and means for moving it into anotherposition.

2. A mufller cut-out comprising a divided sleeve adapted to be placedupon an exhaust pipe and provided with an outlet opening having anexterior valve seat, a swinging valve arm and a valve disk mountedthereupon and adapted to seat upon said valve seat, said valve diskbeing mounted upon said valve arm in a manner to permit of itsoscillation and rotation, and means for yieldingly maintaining saidvalve arm in a position with said valve disk upon its seat.

3. A muffler cut-out comprising a divided sleeve adapted to be placedupon an exhaust pipe and provided with an outlet opening having anexterior valve seat, a swinging valve arm carrying a valve disk adaptedto seat upon said valve seat and having a spherical surface, said valvedisk having a part of its surface spherically recessed and adapted toengage with the spherical surface upon said valve arm, means formaintaining said spherical surfaces in engagement, and means foryieldingly maintaining said valve arm in a position with said valve diskupon its seat.

4. A muffler cut-out comprising a divided sleeve adapted to be placedupon an exhaust pipe and provided with an outlet opening having anexterior valve seat, a swinging valve arm carrying a valve disk adaptedto seat upon said valve seat, said valve disk engaging with said valvearm in a manner to permit of the oscillation and rotation of said valvedisk, a pivoted walking beam rigidly connected to said arm and a springconnected to said beam for yieldingly maintaining said valve arm in aposition with the valve disk upon its seat.

5. A mufiier cut-out comprising a divided sleeve adapted to be placedupon an exhaust pipe and provided with an outlet opening having anexterior valve seat, a swinging valve arm and a valve disk mountedthereupon and adapted to seat upon said valve seat, said valve diskbeing mounted upon said valve arm in a manner to permit of itsoscillation and rotation, and means for yieldingly maintaining saidvalve arm in one of its positions.

6. The combination with an exhaust pipe, of a muffler cut-out adapted tobe placed thereupon and comprising a divided sleeve provided with anoutlet opening and a mov- In Witness whereof, I have hereunto set ablevalve adapted to close the same, the inmy hand in the presence of twoWitnesses 10 gerior Wall of said lslleeve being adapted to this 6th dayof July 1910.

t closely around t e Wall of said exhaust 5 pipe at the ends of saidsleeve, but being en- GUSTAVE LUNDBERG' larged and adapted to fitloosely around Witnesses: said exhaust pipe in its portion betweenBESSIE D. KENNEY, said ends. l/VILLLAM J. ANDREWS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

